JPH11187550A - Clamp for span branch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a clamp for span branch which can simply fix a branch line to a main line. SOLUTION: A clamp for span branch is provided with a clamp main body 1 and a presser 2. A clamp main body 1 shows an approximate T-shape, has a line trench part whose section has a U-shape and which acccepts an electric line (main line) disposed in tension between poles on the upper edge of the T-shape, and has a connection part for connecting a branch line on a vertical edge of the T-shape. The presser 2 fixes the electric line L1 accepted in the line trench part of the clamp main body 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a span branching clamp used for connecting a branch line in the middle of a wire stretched between utility poles.

[0002]

2. Description of the Related Art Conventionally, to connect a branch line in the middle of an electric wire (hereinafter, referred to as "main line") stretched between utility poles, a ring member is attached to the main line using a winding grip or the like. The ring member supports the branch line. The end of the supported branch line is electrically connected to the main line via a compression sleeve or the like.

As a method of connecting a branch line to a main line, a messenger wire is stretched between utility poles without using the above-mentioned ring member.

In the messenger wire method, a messenger wire is stretched along a main line stretched between utility poles, and a branch line is stretched on the messenger wire via a ferrule, an insulator or the like. The end of the stretched branch line is electrically connected to the main line via a compression sleeve or the like.

[0005]

However, the connection of the above-mentioned conventional branch line is troublesome in both the case of using a ring member and the case of using a messenger wire, both in the work of attaching the ring member and the work of attaching the messenger wire. Further, there is a disadvantage that the insulating process of the ring member, the winding grip and the like is troublesome and the working time is lengthened.

Accordingly, the present invention has been made to solve the above-mentioned drawbacks, and an object of the present invention is to provide a clamp for span branching which can easily connect a branch line to a main line. .

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, a span branching clamp according to the present invention is a span branching clamp comprising a clamp body and a presser. It has a substantially T-shape, has a U-shaped cross-section groove for receiving a main line stretched between utility poles on the upper side of the T-shape, and a branch line on the T-shaped vertical side. The clamp has a connecting portion, and the holding member fixes the main line received in the wire groove of the clamp body. Further, the connection of the branch lines is performed by a tension clamp or a compression clamp. Further, the connected branch line is electrically connected to the main line.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view showing a state in which a branch line L2 is connected to a main line L1 by using a span branching clamp (hereinafter, referred to as a "clamp") a1 according to an embodiment.

The clamp a1 mainly comprises a clamp body 1, a presser 2 and a compression clamp 3 with a connecting portion. In the figure, reference numeral 4 denotes a compression sleeve, which electrically connects the end of the branch line L2 to the main line L1.
If the electrical connection with the compression sleeve 4 is sufficiently permitted, the connection by the compression sleeve 4 is omitted.

FIG. 2 is an exploded view of the clamp body 1 and the presser 2. FIG. 3 is a left side view of the clamp body 1 shown in FIG. 2, and FIG. 4 is a presser 2 shown in FIG.
FIG.

As shown in FIG. 2, the clamp body 1 and the presser 2 are composed of a bolt B and a spring washer W.
And the nut N. The screw tip of the bolt B is crushed by one or two ridges after assembly in order to prevent the nut N from falling off.

The clamp body 1 has a substantially T-shape. The T-shaped upper side 1a is provided with a U-shaped cross-section groove 1b for receiving the conductor L1 'whose coating has been stripped from the main line L1, and the T-shaped vertical side 1c. A hole 1d for a bolt for attaching a connection portion of the compression type clamp 3 is provided. In addition, upper side 1
At the intersection of the vertical side 1a and the vertical side 1c, a hole 1e is provided in a direction in which the bolt B can be inserted from the upper side of the vertical side 1c and discharged from the rear side of the upper side 1a.

The line groove 1b on the upper side 1a is
It is formed in a curved shape that is convex toward the direction c. Accordingly, it is possible to cope with the curvature generated on the main line L1 when the tension of the branch line L2 acts on the vertical side 1c (FIG. 2).
L1).

The holding member 2 is formed in a T-shape smaller than the T-shape of the clamp body 1, and its upper side 2a has
A concave groove 2b is formed to have a size that can be inserted into the line groove 1b of the clamp body 1 and corresponds to the main line L1 (conductor L1 ') inserted into the line groove 1b.

A hole 2e for the bolt B corresponding to the hole 1e for the bolt B provided in the clamp body 1 is provided on the vertical side 2c of the holding member 2, and the entrance of the hole 2e. Has a female screw 2 to which the bolt B is screwed.
e 'is provided.

Using the clamp a1 having the above structure, the main line L1
In order to connect the branch line L2 to the main body L1, the portion of the conductor L1 'from which the branch line connection portion of the main line L1 has been stripped is connected to the clamp body 1.
In the groove 1b.

Next, the concave groove 2b of the holding member 2 is inserted into the linear groove portion 1b of the clamp body 1 and abuts on the main line L1 inserted in the linear groove portion 1b, and the hole 2e of the holding member 2 and the clamp body The main line L1 (conductor L1) is firmly gripped by the clamp body 1 by tightening the bolt B previously inserted into the hole 1e and the nut N set on the bolt B via a spring washer W. .

The connection portion of the compression type clamp 3, which is previously gripped with the branch line L 2, is connected to the hole 1 d of the clamp body 1 fixed to the main line L 1 via a bolt nut b.

The gripping of the branch line L2 by the compression type clamp 3 removes the covering of the branch line L2 to expose the conductor L2 ',
After the conductor L2 'is inserted into the compression clamp 3, it is compressed using a hydraulic compressor (not shown).

After the compression type clamp 3 is connected to the clamp body 1, the conductor L2 'at the tip of the branch line L2 becomes the conductor L2 at the portion where the tension is not applied by the branch line L2 of the main line L1.
1 'is connected via a compression sleeve 4. Thereafter, the portions of the clamp body 1, the portion of the compression type clamp 3, and the portion of the compression sleeve 4 are covered with the insulating covers C1, C2 and C3, respectively, and the operation of attaching the branch line L2 is completed.

When electrical conduction between the main line L1 and the branch line L2 is possible only with the clamp a1, the compression sleeve 4
Is omitted. In this case, the vertical portion 1c of the clamp body 1
The compression-type clamp 3 has an integrated structure without the bottle nut b.

As described above, when the compression sleeve 4 can be omitted, the connection of the branch line L2 to the main line L1 is performed as follows.
It can be done more easily.

In the clamp a2 shown in FIG. 5, the branch line L2 is gripped by the existing tension clamp 5 instead of the compression type clamp 3 having the connection portion. As described above, when the tension line 5 is used to grip the branch line L2, unlike the compression type clamp 3, a hydraulic pump-type compressor is not required, and the branch line L2 is not required.
2. The connection position can be easily changed.

[0024]

The clamp according to the present invention comprises a clamp body and a holding member, and the clamp body has a substantially T-shape, and is stretched between utility poles on the upper side of the T-shape. A line groove having a U-shaped cross section for receiving a main line, and a connecting portion for connecting a branch line to a vertical side of the T-shape is provided, and the holding member is a main line received in a line groove of the clamp body. Is fixed, so that the branch line can be easily connected to the main line. Further, when the connection of the branch lines is made by using a tension clamp or a compression type clamp, the branch line can be easily connected using the tension clamp or the compression type clamp. Further, when the connected branch line is connected to the main line, the branch line can be connected to the main line portion where tension from the branch line is not applied.

[Brief description of the drawings]

FIG. 1 is a plan view showing a state where a branch line is connected to a main line using a clamp according to an embodiment of the present invention.

FIG. 2 is an exploded view of a clamp body and a holding member.

FIG. 3 is a left side view of the clamp body of FIG. 2;

FIG. 4 is a left side view of the presser of FIG. 2;

FIG. 5 is a plan view showing a state where a branch line is connected to a main line using a clamp according to another embodiment of the present invention.

[Explanation of symbols]

 a1, a2 Clamp (clamp) for span branching 1 Clamp body 1a Upper side 1b Line groove 1c Vertical side 2 Holder 3 Compression clamp 4 Compression sleeve 5 Tensile clamp L1 Electric wire (main line) L2 Branch line B Bolt N Nut

Claims (3)

[Claims] 1. A clamp for span branching comprising a clamp body and a holding member, wherein the clamp body has a substantially T-shape.
The holding member has a U-shaped cross-sectional groove for receiving an electric wire stretched between utility poles on an upper side of the U-shape, and a connecting portion for connecting a branch line to a vertical side of the T-shape. Is a clamp for fixing an electric wire received in a wire groove portion of the clamp body. 2. The clamp for span branching according to claim 1, wherein the connection of the branch line is made by a tension clamp or a compression type clamp. 3. The clamp according to claim 1, wherein the connected branch line is electrically connected to an electric wire.